fix some errors that happen when they shouldnt

src/file.c

@@ -64,11 +64,13 @@ ResultType(int64_t, objectPtr) impl_read(int64_t* args, CometVM* vm) {
     }
 
     size_t bytesRead = fread(content, amountToRead, 1, f);
-    if (bytesRead != amountToRead) {
+    if (bytesRead < amountToRead) {
+        if (ferror(f)) {
             char* buffer = malloc(128);
             snprintf(buffer, 128, "Error while reading file: %s", strerror(errno));
             return cometError(vm, "IOFail", buffer);
         }
+    }
 
     // serialize string
     return Success(int64_t, objectPtr, cometSerializeString(content));
@@ -88,9 +90,13 @@ ResultType(int64_t, objectPtr) impl_readLine(int64_t* args, CometVM* vm) {
     ssize_t read = getline(&line, &len, f);
 
     if (read == -1) {
+        if (ferror(f)) {
             char* buffer = malloc(128);
             snprintf(buffer, 128, "Error while reading line: %s", strerror(errno));
             return cometError(vm, "IOFail", buffer);
+        } else {
+            return Success(int64_t, objectPtr, cometSerializeString(""));
+        }
     }
 
     if (read > 0 && line[read - 1] == '\n') {